Masterton fire service Station Officer Mike Cornford said firefighters, police and paramedics were called to the scene of the crash. The fire crew had helped free the driver and secure him on a stretcher.
He said there were no other vehicles involved in the incident and an ambulance took the man to Wairarapa Hospital for further treatment. The runaway journey started as the vehicle passed the former Totara Drive School, sideswiping a zebra crossing sign about 400 metres north of the Rice property.
The vehicle then tore through a section of concrete block fencing surrounding a property on the corner of Stamford Place and Third St, uprooting and snapping trees before bouncing off the front of the house and careering through another fence and across the front lawn of the neighbouring property.
The elderly woman owner of the corner home had been away at the time, while the 84-year-old male owner of the next door property had been indoors and thought "a truck was going past".
The vehicle next travelled across a public walkway area bordering the second home and came to rest with its back wheels dangling above the far bank of the stream.
The driver returned to the crash scene late yesterday morning in search of his vehicle, which had been towed from the site. He had spoken briefly about the incident to Mr Rice and his brother, the men said. He was shaking during their conversation, Mr Rice said, but apart from a sore hand "didn't have a mark on him". The man, who had a birthday on Saturday, told the brothers he had suffered a seizure and remembered nothing of the crash.